Correlazioni tra dimensioni nucleolari e numero nucleolini negli ovociti di due specie di echinodermi e di due specie di molluschi

The AA. in the oocytes of $Paracentrotus$ $lividus$, $Sphaerechinus$ $granularis$, $Mytilus$ $galloprovincialis$ and $Chiton$ $olivaceus$ could further on ascertain, with comparative statistical observations, that exist a correlation not only between nucleoli’s size and nucleolini number, but that between species belonging at two different types, relative correlation’s coefficients are almost corresponding too.